2000 Toyota 4Runner Blower motor (fan) stuck in on position

Tiny
GDMAC3K
  • MEMBER
  • 2000 TOYOTA 4RUNNER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 144,000 MILES
Blower motor fan blows warm/hot air constantly - even when in "OFF" position on dash panel. Blows air out of front passenger floor position. The only way to make it stop is to turn off the ignition. To offset the interior discomfort, I need to turn ON A/C, with Fan set to HIGH position.
Thursday, October 7th, 2010 AT 10:19 AM

5 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi gdmac3k,

Thank you for the donation.

The blower fan motor relay is being activated when the ignition switch is turned on.

Is the air speed low, medium or high?
Are you able to control the air speed with the blower switch?

Possible causes are :

1. Faulty blower switch, ( higher possibility).

2. Relay Yellow/Red wire shorted to body ground, ( this would result in the blower running at highest speed)

The air coming out of passenger floor position indicates a fault in the air outlet servomotor.

Is vehicle equipped with manual or automatic climate control?
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Friday, October 8th, 2010 AT 9:16 AM
Tiny
GDMAC3K
  • MEMBER
  • 3 POSTS
Answers to your questions:

-blower speed is low
-cannot control air speed with blower switch
-vehicle has automatic climate control
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Tuesday, October 12th, 2010 AT 11:39 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the blower motor linear controller, ( located behind right side of dash).

Unplug it and test if the blower works correctly.
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Wednesday, October 13th, 2010 AT 9:21 AM
Tiny
GDMAC3K
  • MEMBER
  • 3 POSTS
Embarassing. The switch controlling the REAR seating area heat and AC levels was ON. Operator error.
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Thursday, October 14th, 2010 AT 4:05 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
There is always a first for everything so just laught it over and be done, lol.

Have a nice day.
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Thursday, October 14th, 2010 AT 4:22 PM

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